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(一) 川西平原过去基本上是两熟制,良好的自然条件未能充分利用。为了探索进一步提高粮食产量的新途径,1970年以来,我们以广汉县原北外公社(现已合并为城郊公社)为基点,研究川西平原发展玉米连作稻和双季稻的问题,取得了初步成效,使这个县的玉米连作稻和双季稻从无到有,面积从小到大,近年来全县稳定在30％以上,七年平均双季稻比一季中稻每亩多收240斤(市亩,下同),对粮食增产起了促进作用。
(1) The past western Sichuan Plain was basically two-cropping system in the past, and the good natural conditions were not fully utilized. In order to explore new ways to further improve grain production, we started with the original North Guangyuan commune (now merged into a suburban commune) in Guanghan County to study the issue of developing continuous cropping of rice and double cropping rice in western Sichuan Plain since 1970 In recent years, the county has been stable at above 30%. The average annual double-cropped paddy yield in the seven years is 240kg more than that of the middle-season paddy rice in the same season (City Mu, the same below), which has played a catalytic role in increasing grain output.